class {
  onCreate() {
    this.state = { count: 0 };
  }
  increment() {
    this.state.count++;
  }
}

style {
  .count {
    color: #70b;
    font-size: 3em;
  }
  .example-button {
    font-size: 1em;
    padding: 0.5em;
  }
}

<div.count>${state.count}</div>
<button.example-button on-click('increment')>Click me!</button>
